Executes a previously prepared statement.
If specific data is large, it can be sent separately prior to this command (see COM_STMT_SEND_LONG_DATA).
If a statement is re-executed without changing the bind types, the types do not need to be sent to the server again.
Client to server.
Since MariaDB server version 10.2, can be -1 (or, 0xFFFFFFFF), indicating execution of the last statement prepared on current connection. In such case COM_STMT_EXECUTE must follow COM_STMT_PREPARE or another COM_STMT_EXECUTE with statement id=-1
|2||cursor for update|
parameter type flag byte:
The NULL-Bitmap indicates if parameters are null (one bit per parameter).
NULL-bitmap size is (parameter number + 7) / 8
The server can answer with 3 different responses: